Documentation/filesystems/virtiofs.rst

1 .. SPDX-License-Identifier: GPL-2.0
6 virtiofs: virtio-fs host<->guest shared file system
9 - Copyright (C) 2019 Red Hat, Inc.
14 VIRTIO "virtio-fs" device for guest<->host file system sharing.  It allows a
19 booting from a root file system located on the host, persistent storage for
22 Although it is possible to use existing network file systems for some of these
24 expose the storage network to the guest.  The virtio-fs device was designed to
25 solve these problems by providing file system access without networking.
27 Furthermore the virtio-fs device takes advantage of the co-location of the
35 .. code-block:: sh
37   guest# mount -t virtiofs myfs /mnt
39 Please see https://virtio-fs.gitlab.io/ for details on how to configure QEMU
43 -------------
51 The atime-related mount options, for example, noatime, strictatime,
53 underlying filesystem of the directory that has been exported
58 Since the virtio-fs device uses the FUSE protocol for file system requests, the
62 with the virtio-fs device interface.
65 response portion of the buffer is filled in by the host and the guest handles
72 it is not possible to change the order of requests that have been enqueued.
75 the virtio-fs device uses a "hiprio" virtqueue specifically for requests that